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MODEL PAPER - 10 [2026] — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMODEL PAPER - 10 [2026]2 Marks
Question
Solution X turns universal indicator blue to purple whereas solution Y turns universal indicator orange to red.
a. What will be the action of solution X on litmus?
b. What will be action of solution Y on litmus?
c. Name any two substances which can give solutions like X .
✓

Answer

a. Solution X will turn red litmus paper to blue as it is basic in nature.
b. Solution Y will turn blue litmus paper to red as it is acidic in nature.
c. Milk of Magnesia (saturated $\mathrm{Mg}(\mathrm{OH})_{2}$ ) and Sodium Hydroxide $(\mathrm{NaOH})$ solution are bases like solution X .

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